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Sorting ArrayList and printing lowest value  RSS feed

 
charlie mills
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I have managed to work out how to print the highest value, but am unsure how to print the lowest one. so far I have this:


I assume that for the lowest value, the idea is the same, but i can't have a certain number in the brackets because the arrayList length is unknown.
Thinking out loud here, but is there anyway I can find out the length of this ArrayList and then put that number in the brackets?
 
fred rosenberger
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according to the API (which you should learn to read), you can call the size() method on the array to get the number of elements:

int size()
Returns the number of elements in this list.

so, if you have 5 elements, the last will be at index 4. in other words the last index will be at size() - 1.
 
Rob Spoor
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I suggest you check whether or not the List is empty. If it is, both get(0) and get(temperatures.size() - 1) will fail.
 
charlie mills
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OK thanks, i've managed to get it to work
 
Paul Beckett
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also have a look at the reverse(List), reverseOrder(), and reverseOrder(Comparator) methods in the Collections class.
You can combine these with sort to reverse the list.
 
It is sorta covered in the JavaRanch Style Guide.
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